M1

M1, M01 or M-1 may refer to:

Arts, entertainment & media

the Crab Nebula, also known as Messier object M1
ATC code M01 Anti-inflammatory and antirheumatic products, a subgroup of the Anatomical Therapeutic Chemical Classification System

Primary motor cortex or M1, a symbol of the primary motor cortex in mammals in neurology
M1 protein, a matrix protein of the influenza virus
Muscarinic acetylcholine receptor M1, a receptor in the human autonomic nervous system
British NVC community M1, Sphagnum auriculatum bog pool community
20-O-beta-D-glucopyranosyl-20(S)-protopanaxadiol, a ppd-type monoglucoside ginsenoside metabolized by intestinal bacteria
M1 macrophage, a phenotype of macrophage

Bucharest Metro Line M1, part of the Bucharest Metro, Romania
Chesapeake and Ohio class M-1, a steam-turbine locomotive
Line 1 (Budapest Metro), the first line of Budapest Metro, Hungary
LNER Class M1, a class of British steam locomotives
M-1 Rail Line, now the QLine, streetcar service in Detroit
M1 (Copenhagen), part of the city's Metro system, Denmark
M1 (Istanbul Metro), a light railway system in Istanbul, Turkey
M1 (Lausanne Métro), part of the Lausanne Metro in Switzerland
M1 (Paris Métro), the first rolling stock on the Paris Metro in 1900
M1 (İzmir Metro)
M1/M3 (railcar), a series of electric multiple unit cars on the Long Island Rail Road and Metro-North Railroad
Metro M1 (Prague), metro kit M1, which is used on line C of the Prague Metro
Milan Metro Line 1
M1 (Warsaw), the first metro line of the Warsaw Metro
PRR M1, a class of steam locomotive
M series (Toronto subway), former rolling stock of the Toronto subway
Metro North West & Bankstown Line, the first metro line of the Sydney Metro

M1 road (Australia), different sections of the A1 highway
- M1 (New South Wales)
- M1 (Queensland)
- M1 (Victoria)
Metroad 1, a road in Sydney, Australia
M-1 (Michigan highway), a road in the United States that runs from Detroit northwesterly to Pontiac
M1 highway (Belarus), a road connecting the border with Poland and the border with Russia
M1 highway (Russia), a road connecting Moscow and the border with Belarus
M1 (East London), a Metropolitan Route in East London, South Africa
M1 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa
M1 (Pretoria), a Metropolitan Route in Pretoria, South Africa
M1 (Durban), a Metropolitan Route in Durban, South Africa
M1 (Port Elizabeth), a Metropolitan Route in Port Elizabeth, South Africa
M1 motorway (Hungary), a road connecting Budapest and Győr
M1 motorway (Northern Ireland), a road connecting Belfast and Dungannon
M1 motorway (Pakistan), a 155 km (96 mi) road connecting Peshawar and Rawalpindi
M1 motorway (Republic of Ireland), a road connecting Dublin to the border with Northern Ireland
M1 motorway, a road in England connecting London and Leeds
Highway M01 (Ukraine), a road connecting Kyiv and the border with Belarus
M1 Road (Zambia)

M1 category vehicle, a classification of passenger vehicles under the United Nations Economic Commission for Europe

Hakuto-R Mission 1, private Japanese lunar landing mission
M-1 (rocket engine), the largest liquid Hydrogen and LOx rocket engine ever designed
Martin M-1, glider
Matteson M-1, glider
Miles M.1 Satyr, a 1930s British single-seat aerobatic biplane
Verville-Sperry M-1 Messenger - 1922

M-1 Global or M-1 Mixfight, a mixed martial arts sports organization
M-1 visa, a vocational training student visa for the USA
M1 (Singaporean company), a telecommunications company in Singapore
M1 World Championship, the first esports world championship for the mobile game Mobile Legends: Bang Bang held in 2019
M1, a difficulty grade in mixed climbing